Industry standard footprint, 30% more power handling
Power Range: Up to 70W
Height: 14.0mm Max
Footprint: 17.7mm x 14.5mm Max
Topology: Forward and Flyback
Pulse PN
Electrical Specifications @25C – Operating Temperature -40C to 130C
1
Pri. Inductance
(1-3)
54uH +/- 10%
(1-3) w/
Lk. Inductance
0.67uH Max
(10,9,6,7,4,5) shorted
(1-3)
62
(9-6)
6.5
DCR
mΩ Max
(10-7)
6.5
(4-5)
120
Hi-Pot
Pri-Sec
2250
Vdc
K1 Factor
1125.0
Pri. Inductance
(1-3)
48uH +/- 10%
(1-3) w/
Lk. Inductance
0.67uH Max
(10,9,6,7,4,5) shorted
(1-3)
62
(9-6)
10
DCR
mΩ Max
(10-7)
10
(4-5)
120
Hi-Pot
Pri-Sec
2250
Vdc
K1 Factor
1000.0
Pri. Inductance
(1-3)
41uH +/- 10%
(1-3) w/
Lk. Inductance
0.67uH Max
(10,9,6,7,4,5) shorted
(1-3)
62
(9-6)
20
DCR
mΩ Max
(10-7)
23
(4-5)
120
Hi-Pot
Pri-Sec
2250
Vdc
K1 Factor
854.2
Pri. Inductance
(1-3)
21uH +/- 10%
(1-3) w/
Lk. Inductance
0.3uH Max
(10,9,6,7,4,5) shorted
(1-3)
31
(9-6)
10
DCR
mΩ Max
(10-7)
10
(4-5)
180
Hi-Pot
Pri-Sec
2250
Vdc
K1 Factor
538.5
Schematic
8
1
PA3855.001NL
3
1
Flyback Transformer
5.33
1
PA3855.002NL
2
1
Flyback Transformer
2.67
1
PA3855.003NL
1
1
Flyback Transformer
4.33
1
PA3855.004NL
3
1
Flyback Transformer
1
power.pulseelectronics.com
P719.E (07/17)
http://www.power.pulseelectronics.com/contact
High Frequency Wire Wound Transfomers
EP13Plus Platforms - SMT
Pulse PN
PA3855.005NL
PA3855.006NL
PA3856.001NL
PA3856.002NL
PA3856.003NL
Electrical Specifications @25C – Operating Temperature -40C to 130C
1
Pri. Inductance
(1-3)
21uH +/- 10%
(1-3) w/
Lk. Inductance
0.3uH Max
(10,9,6,7,4,5) shorted
(1-3)
31
(9-6)
14
DCR
mΩ Max
(10-7)
14
(4-5)
180
Hi-Pot
Pri-Sec
2250
Vdc
K1 Factor
583.3
Pri. Inductance
(1-3)
21uH +/- 10%
(1-3) w/
Lk. Inductance
0.3uH Max
(10,9,6,7,4,5) shorted
(1-3)
31
(9-6)
58
DCR
mΩ Max
(10-7)
58
(4-5)
180
Hi-Pot
Pri-Sec
2250
Vdc
K1 Factor
583.3
Pri. Inductance
(1-3)
100
uH +/- 15%
(1-3) w/
Lk. Inductance
0.4uH Max
(10,9,6,7,4,5) shorted
(1-3)
29.4
(9-6)
6.5
DCR
mΩ Max
(10-7)
6.5
(4-5)
120
Hi-Pot
Pri-Sec
2250
Vdc
K1 Factor
27.8
Pri. Inductance
(1-3)
100uH +/- 15%
(1-3) w/
Lk. Inductance
0.4uH Max
(10,9,6,7,4,5) shorted
(1-3)
29.4
(9-6)
10
DCR
mΩ Max
(10-7)
10
(4-5)
120
Hi-Pot
Pri-Sec
2250
Vdc
K1 Factor
27.8
Pri. Inductance
(1-3)
100uH +/- 15%
(1-3) w/
Lk. Inductance
0.4uH Max
(10,9,6,7,4,5) shorted
(1-3)
29.4
DCR
(9-6)
31.6
mΩ Max
(10-7)
36
(4-5)
120
Hi-Pot
Pri-Sec
2250
Vdc
K1 Factor
27.8
Schematic
3
1
2.25
1
Flyback Transformer
1.33
1
0.89
1
Flyback Transformer
6
1
3
1
Forward Transformer
4
1
2
1
Forward Transformer
1.71
1
0.86
1
Forward Transformer
2
power.pulseelectronics.com
P719.E (07/17)
http://www.power.pulseelectronics.com/contact
High Frequency Wire Wound Transfomers
EP13Plus Platforms - SMT
Pulse PN
PA3856.004NL
PA3856.005NL
PA3856.006NL
Electrical Specifications @25C – Operating Temperature -40C to 130C
1
Pri. Inductance
(1-3)
128uH +/- 25%
(1-3) w/
Lk. Inductance
0.15uH Max
(10,9,6,7,4,5) shorted
(1-3)
17.6
(9-6)
14.4
DCR
mΩ Max
(10-7)
17
(4-5)
410
Hi-Pot
Pri-Sec
2250
Vdc
K1 Factor
41.7
Pri. Inductance
(1-3)
128uH +/- 15%
(1-3) w/
Lk. Inductance
0.15uH Max
(10,9,6,7,4,5) shorted
(1-3)
17.6
(9-6)
31.6
DCR
mΩ Max
(10-7)
36
(4-5)
410
Hi-Pot
Pri-Sec
2250
Vdc
K1 Factor
41.7
Pri. Inductance
(1-3)
128uH +/- 15%
(1-3) w/
Lk. Inductance
0.15uH Max
(10,9,6,7,4,5) shorted
(1-3)
17.6
(9-6)
105.6
DCR
mΩ Max
(10-7)
122
(4-5)
426
Hi-Pot
Pri-Sec
2250
Vdc
K1 Factor
41.7
Schematic
1.6
1
1.2
1
Forward Transformer
1.14
1
2
1
Forward Transformer
0.47
1
0.82
1
Forward Transformer
Notes:
1. The temperature of the component (ambient plus temperature rise) must be within the 4. The standard pin-numbering for this package is indicated in the below mechanical
stated operating temperature range.
drawing showing pin 1 on the lower right corner and the numbers proceeding clockwise
to pin 10 on the upper right corner.
2. For flyback topology applications, it is necessary to ensure that the transformer will not
saturate in the application. The peak flux density (Bpk) should remain below 2700Gauss. 5. Optional Tape & Reel packaging can be ordered by adding a “T” suffix to the part
To calculate the peak flux density use the following formula:
number (i.e. (PA3855.001NL becomes PA3855.001NLT). Pulse complies with industry
Bpk (Gauss) = K1_Factor * Ipk(A)
standard tape and reel specification EIA481. The tape and reel for this product has a
width (W=32mm), pitch (Po=24mm) and depth (Ko=13.2mm).
3. In high volt-μsec applications, it is important to calculate the core loss of the trans-
former. Approximate transformer core loss can be calculated as:
CoreLoss (W) = 3.84E-14 * (Freq_kHz)
1.63
* (ΔB_Gauss)
2.63
where
ΔB
can be calculated as:
For Flyback Topology:
ΔB
= K1_Factor *
ΔI(A)
For Forward Topology:
ΔB
= K1_Factor * Volt-μsec
3
power.pulseelectronics.com
P719.E (07/17)
http://www.power.pulseelectronics.com/contact
High Frequency Wire Wound Transfomers
EP13Plus Platforms - SMT
Mechanical
PA3855.XXNL/ PA3856.XXNL
For More Information
Pulse Worldwide
Headquarters
15255 Innovation Drive Ste 100
San Diego, CA 92128
U.S.A.
Pulse Europe
Pulse Electronics GmbH
Am Rottland 12
58540 Meinerzhagen
Germany
Pulse China Headquarters
Pulse Electronics (ShenZhen) CO., LTD
D708, Shenzhen Academy of
Aerospace Technology,
The 10th Keji South Road,
Nanshan District, Shenzhen, P.R.
China 518057
Tel: 86 755 33966678
Fax: 86 755 33966700
Pulse North China
Room 2704/2705
Super Ocean Finance Ctr.
2067 Yan An Road West
Shanghai 200336
China
Tel: 86 21 62787060
Fax: 86 2162786973
Pulse South Asia
135 Joo Seng Road
#03-02
PM Industrial Bldg.
Singapore 368363
Pulse North Asia
1F, No.111
Xiyuan Road
Zhongli District
Taoyuan City 32057
Taiwan (R.O.C)
Tel: 886 3 4356768
Fax: 886 3 4356820
Tel: 858 674 8100
Fax: 858 674 8262
Tel: 49 2354 777 100
Fax: 49 2354 777 168
Tel: 65 6287 8998
Fax: 65 6280 0080
Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product names mentioned herein may
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